文件名:jquery.hy.key.js
复制代码 代码如下:


jQuery.extend({

getKeyNum:function(e){
var keynum;
if(window.event){ // IE
keynum = event.keyCode;
}
else if(e.which){ // Netscape/Firefox/Opera
keynum = e.which;
}
return keynum;
},

isInt:function(e){
var keynum = this.getKeyNum(e);
if(keynum >= 48 && keynum <= 57 || keynum == 8){//firefox下退格需判断8
return true;
}
return false;
},

isFloat:function(txt,e){
var keynum = this.getKeyNum(e);
if(keynum == 46){//输入小数点
if(txt.value.length == 0){
return false;
}else if(txt.value.indexOf('.') >= 0){
return false;
}else{
return true;
}
}
if(this.isInt(e)){
return true;
}
return false;
}
});