<script language="javascript" type="text/javascript">
function WEIGHT_MEASURES() {
	this.mTon = 1000
	this.mKilogram = 1
	this.mGram = 0.001
	this.mMilligram = 0.000001
	this.cJin = 0.5
	this.cDan = 50
	this.cLiang = 0.05
	this.cQian = 0.005
	this.avdpPound = 0.45359237
	this.briTon = 2240 * this.avdpPound
	this.usTon = 2000 * this.avdpPound
	this.briCWT = 112 * this.avdpPound
	this.usCWT = 100 * this.avdpPound
	this.briStone = 14 * this.avdpPound     
	this.avdpOunce = this.avdpPound / 16
	this.avdpDram= this.avdpPound / 256
	this.avdpGrain = this.avdpPound / 7000
	this.troyPound = 5760 * this.avdpGrain
	this.troyOunce = 480 * this.avdpGrain
	this.troyDWT = 24 * this.avdpGrain
	this.troyGrain = this.avdpGrain
}
var weight_data = new WEIGHT_MEASURES();
function checkNum(str) {
	for (var i=0; i<str.length; i++) {
		var ch = str.substring(i, i + 1)
		if (ch!="." && ch!="+" && ch!="-" && ch!="e" && ch!="E" && (ch < "0" || ch > "9")) {
			alert("请输入有效的数字");
			return false;
		}
	}
	return true
}
function normalize(what,digits) {
	var str=""+what;
	var pp=Math.max(str.lastIndexOf("+"),str.lastIndexOf("-"));
	var idot=str.indexOf(".");
	if (idot>=1) {
		var ee=(pp>0)?str.substring(pp-1,str.length):"";
		digits+=idot;
		if (digits>=str.length)
			return str;
		if (pp>0 && digits>=pp)
			digits-=pp;
		var c=eval(str.charAt(digits));
		var ipos=digits-1;
		if (c>=5) {
			while (str.charAt(ipos)=="9")
				ipos--;
			if (str.charAt(ipos)==".") {
				var nc=eval(str.substring(0,idot))+1;
				if (nc==10 && ee.length>0) {
					nc=1;
					ee="e"+(eval(ee.substring(1,ee.length))+1);
				}
				return ""+nc+ee;
			}
			return str.substring(0,ipos)+(eval(str.charAt(ipos))+1)+ee;
		}
		else
			var ret=str.substring(0,digits)+ee;
		for (var i=0; i<ret.length; i++)
				if (ret.charAt(i)>"0" && ret.charAt(i)<="9")
					return ret;
		return str;
	}
	return str;
}
function compute(obj,val,data) {
	if (obj[val].value) {
		var uval=0;
		uval = obj[val].value*data[val];
		if( (uval >= 0) && (obj[val].value.indexOf("-") != -1) ) {
			uval = -uval;    
		}
		for (var i in data)
			obj[i].value=normalize(uval/data[i],8);
	}
}
function resetValues(form,data)  {  
		for (var i in data)
			form[i].value="";
}
function resetAll(form) {   
	resetValues(form,weight_data); 
}
</script>


<table width="650" borderColorDark="#ffffff" borderColorLight="#008000" border="1" cellpadding="3" cellspacing="0" align="center">
	<form action="">
	<tr height=10><td colspan=4 bgcolor="#CCE6CD" align="center">重量转换换算器 &nbsp; <a href="javascript:window.external.addfavorite('http://www.famens.com', '重量转换换算器')">←【加入收藏夹】</a></td></tr>
	<tr>
		<td align=center colspan=6><b>〖公&nbsp;&nbsp;&nbsp;制〗</b></td>
	</tr>
	<tr> 
		<td align=right nowrap>吨</td>
		<td align=left><input name=mTon size="12"> <input onClick="if (checkNum(mTon.value)) compute(this.form,mTon.name,weight_data)" type=button value="换算" name=mTon_bt></td>
		<td align=right nowrap>公斤<font style="font-size=9px;">(kg)</font></td>
		<td align=left><input name=mKilogram size="12"> <input onClick="if (checkNum(mKilogram.value)) compute(this.form,mKilogram.name,weight_data)" type=button value="换算" name=mKilogram_bt></td>
	</tr>
	<tr>
		<td align=right nowrap>克<font style="font-size=9px;">(g)</font></td>
		<td align=left><input name=mGram size="12"> <input onClick="if (checkNum(mGram.value)) compute(this.form,mGram.name,weight_data)" type=button value="换算" name=mGram_bt></td>
		<td align=right nowrap>毫克<font style="font-size=9px;">(mg)</font></td>
		<td align=left><input name=mMilligram size="12"> <input onClick="if (checkNum(mMilligram.value)) compute(this.form,mMilligram.name,weight_data)" type=button value="换算" name=mMilligram_bt></td>
	</tr>
	<tr>
		<td align=center colspan=6><b>〖市&nbsp;&nbsp;&nbsp;制〗</b></td>
	</tr>
	<tr>
		<td align=right nowrap>市斤</td>
		<td align=left><input name=cJin size="12"> <input onClick="if (checkNum(cJin.value)) compute(this.form,cJin.name,weight_data)" type=button value="换算" name=cJin_bt></td>
		<td align=right nowrap>担</td>
		<td align=left><input name=cDan size="12"> <input onClick="if (checkNum(cDan.value)) compute(this.form,cDan.name,weight_data)" type=button value="换算" name=cDan_bt></td>
	</tr>
	<tr>
		<td align=right nowrap>两</td>
		<td align=left><input name=cLiang size="12"> <input onClick="if (checkNum(cLiang.value)) compute(this.form,cLiang.name,weight_data)" type=button value="换算" name=cLiang_bt></td>
		<td align=right nowrap>钱</td>
		<td align=left><input name=cQian size="12"> <input onClick="if (checkNum(cQian.value)) compute(this.form,cQian.name,weight_data)" type=button value="换算" name=cQian_bt></td>
	</tr>
	<tr>
		<td align=center colspan=6><b>〖金&nbsp;&nbsp;衡&nbsp;&nbsp;制〗</b></td>
	</tr>
	<tr>
		<td align=right nowrap>金衡磅<font style="font-size=9px;">(lb&nbsp;t)</font></td>
		<td align=left><input name=troyPound size="12"> <input onClick="if (checkNum(troyPound.value)) compute(this.form,troyPound.name,weight_data)" type=button value="换算" name=troyPound_bt></td>
		<td align=right nowrap>金衡盎司<font style="font-size=9px;">(oz&nbsp;t)</font></td>
		<td align=left><input name=troyOunce size="12"> <input onClick="if (checkNum(troyOunce.value)) compute(this.form,troyOunce.name,weight_data)" type=button value="换算" name=troyOunce_bt></td>
	</tr>
	<tr>
		<td align=right nowrap>英钱<font style="font-size=9px;">(dwt)</font></td>
		<td align=left><input name=troyDWT size="12"> <input onClick="if (checkNum(troyDWT.value)) compute(this.form,troyDWT.name,weight_data)" type=button value="换算" name=troyDWT_bt></td>
		<td align=right nowrap>金衡格令</td>
		<td align=left><input name=troyGrain size="12"> <input onClick="if (checkNum(troyGrain.value)) compute(this.form,troyGrain.name,weight_data)" type=button value="换算" name=troyGrain_bt></td>
	</tr>
	<tr>
		<td align=center colspan=6><b>〖常&nbsp;&nbsp;衡&nbsp;&nbsp;制〗</b></td>
	</tr>
	<tr>
		<td align=right nowrap>(英制)长吨</td>
		<td align=left><input name=briTon size="12"> <input onClick="if (checkNum(briTon.value)) compute(this.form,briTon.name,weight_data)" type=button value="换算" name=briTon_bt></td>
		<td align=right nowrap>(美制)短吨</td>
		<td align=left><input name=usTon size="12"> <input onClick="if (checkNum(usTon.value)) compute(this.form,usTon.name,weight_data)" type=button value="换算" name=usTon_bt></td>
	</tr>
	<tr>
		<td align=right nowrap>英担<font style="font-size=9px;">(cwt)</font></td>
		<td align=left><input name=briCWT size="12"> <input onClick="if (checkNum(briCWT.value)) compute(this.form,briCWT.name,weight_data)" type=button value="换算" name=briCWT_bt></td>
		<td align=right nowrap>美担<font style="font-size=9px;">(cwt)</font></td>
		<td align=left><input name=usCWT size="12"> <input onClick="if (checkNum(usCWT.value)) compute(this.form,usCWT.name,weight_data)" type=button value="换算" name=usCWT_bt></td>
	</tr>
	<tr>
		<td align=right nowrap>英石</td>
		<td align=left><input name=briStone size="12"> <input onClick="if (checkNum(briStone.value)) compute(this.form,briStone.name,weight_data)" type=button value="换算" name=briStone_bt></td>
		<td align=right nowrap>磅<font style="font-size=9px;">(lb)</font></td>
		<td align=left><input name=avdpPound size="12"> <input onClick="if (checkNum(avdpPound.value)) compute(this.form,avdpPound.name,weight_data)" type=button value="换算" name=avdpPound_bt></td>
	</tr>
	<tr>
		<td align=right nowrap>盎司<font style="font-size=9px;">(oz)</font></td>
		<td align=left><input name=avdpOunce size="12"> <input onClick="if (checkNum(avdpOunce.value)) compute(this.form,avdpOunce.name,weight_data)" type=button value="换算" name=avdpOunce_bt></td>
		<td align=right nowrap>打兰<font style="font-size=9px;">(dr)</font></td>
		<td align=left><input name=avdpDram size="12"> <input onClick="if (checkNum(avdpDram.value)) compute(this.form,avdpDram.name,weight_data)" type=button value="换算" name=avdpDram_bt></td>
	</tr>
	<tr>
		<td align=right nowrap>格令</td>
		<td align=left><input name=avdpGrain size="12"> <input onClick="if (checkNum(avdpGrain.value)) compute(this.form,avdpGrain.name,weight_data)" type=button value="换算" name=avdpGrain_bt></td>
		<td colspan="2"><div align="right"><input onClick=resetAll(this.form) type=button value="数据重置" name=res7></div></td>
	</tr>
</table>