//判断字符串,只允许数字,正负均可,小数也可以
function chkN(str){
if (str.search(/^(-|\+)?\d+(\.\d+)?$/) != -1){
return true;
}
else{
return false;
}
}
//检查是否为正数
function chkNN(str){ if (str.search(/^\d+(\.\d+)?$/) != -1){
return true;
}
else{
return false;
}}
function chkN(str){
if (str.search(/^(-|\+)?\d+(\.\d+)?$/) != -1){
return true;
}
else{
return false;
}
}
//检查是否为正数
function chkNN(str){ if (str.search(/^\d+(\.\d+)?$/) != -1){
return true;
}
else{
return false;
}}
a=a& "00"
a=left(len(a)-2)
<input onkeypress="return /^[1-9]\d{2}/.test(this.value)?(/\./.test(this.value)?(/\.\d{2}/.test(this.value)?(event.keyCode==0):(event.keyCode>=48&&event.keyCode<=57)):(event.keyCode==46)):(event.keyCode>=48&&event.keyCode<=57)"
onpaste="return false" ondragenter="return false" style="ime-mode:disabled">
------------------------------------------------------
<input type="text" id="text1"><script language="javascript">
var obj = document.getElementById("text1");function ft(obj){
s="||||||||||||||";
clipboardData.setData('text',s);
obj.focus();
document.execCommand('paste');
var arr=obj.value.split(s);
obj.value=arr[1];
obj.document.selection.empty();
obj.document.selection.createRange().select();
obj.focus();
clipboardData.setData('text',arr[0]);
document.execCommand('paste');
return arr[0].length;
}obj.onkeydown=function(){
var kc=event.keyCode;
if(!(kc>=45 && kc<=57) && !(kc>=96 && kc<=105) && kc!=190 && kc!=110 && kc!=189 && kc!=109 && kc!=8 && kc!=9 && !(kc>=35 && kc<=40)){
event.returnValue=false;
return;
}
switch(kc){
case 190:
case 110:
if(obj.value.indexOf(".")>-1)event.returnValue=false;
break;
case 189:
case 109:
obj.value=obj.value*-1;
event.returnValue=false;
break;
}
if( (kc>=48 && kc<=96) || (kc>=57 && kc<=105)){
if(obj.value.indexOf(".")<0)return;
if(ft(obj)>obj.value.indexOf(".")){
if(obj.value.length-obj.value.indexOf(".")>=3)event.returnValue=false;
}
}
}obj.onblur=function(){
if(obj.value.indexOf(".")<0){
obj.value=obj.value+".00";
}
else{
obj.value=obj.value.substring(0,obj.value.indexOf(".")+1) + (obj.value.substring(obj.value.indexOf(".")+1) +"00").substring(0,2);
}
}
</script>
<script language="javascript" type="text/javascript">
<!--//
function keyIsNumber(keycode)
{
if (((keycode > 47)&&(keycode < 58))||(keycode > 95 && keycode <106)||(keycode == 8)||(keycode == 46)||(keycode == 110))
{
return true;
}
else
{
return false;
}
}
//-->
</script>
<script language="javascript" event="onkeydown" for="document">
if(event.srcElement.type == "text")
{
if(!keyIsNumber(event.keyCode)||((event.srcElement.value.indexOf(".") > -1)&&(event.keyCode == 110||(event.srcElement.value.length-event.srcElement.value.indexOf(".") == 3)&&event.keyCode != 8)))
{
return false;
}
}
</script><input type="text" onchange="this.value=formatNumber(this.value)" />