直接给出代码了:
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME= "Generator" CONTENT= "EditPlus" >
<META NAME= "Author" CONTENT= "" >
<META NAME= "Keywords" CONTENT= "" >
<META NAME= "Description" CONTENT= "" >
</HEAD>
<BODY>
<input onkeyup= 'check(this)' />
</BODY>
<script>
function check(obj){
var sreg = /^-+.*/g;
var zero = /^0[1-9]+\.*\d*/g;
var val = obj.value;
var plus = '' ;
if (sreg.test(val)){
val = val.replace(/-+/g, '' );
plus = '-' ;
}
val = val.replace(/\s+/g, '' );
if (/^\.+.*$/.test(val)){
val = '' ;
}
val = val.replace(/[^\d\.]/, '' );
val = val.replace(/(^\d+\.{1})(\d*).*/g, '$1$2' );
val = val.replace(/(^\d+\.\d{3})\d*/g, '$1' );
val = val.replace(/^[0]*(0{1})([1-9]*)(.*)/g, '$1$2$3' );
if (zero.test(val)){
val = val.replace(/0([1-9]+)(.*)$/, '$1$2' );
}
obj.value = plus+val;
}
</script>
</HTML>
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服务器之家写的一个替换 非数字与中英文逗号的函数,需要的朋友可以参考一下
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function renumdou(str){
var regexp = /[^\d,,]]*/g;
newstr=str.replace(regexp, "" );
return newstr
}
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