直接上代码

	function isPriceNumber(_keyword){
		if(_keyword == "0" || _keyword == "0." || _keyword == "0.0" || _keyword == "0.00"){
			_keyword = "0"; return true;
		}else{
			var index = _keyword.indexOf("0");
			var length = _keyword.length;
			if(index == 0 && length>1){/*0开头的数字串*/
				var reg = /^[0]{1}[.]{1}[0-9]{1,2}$/;
				if(!reg.test(_keyword)){
					return false;
				}else{
					return true;
				}
			}else{/*非0开头的数字*/
				var reg = /^[1-9]{1}[0-9]{0,10}[.]{0,1}[0-9]{0,2}$/;
				if(!reg.test(_keyword)){
					return false;
				}else{
					return true;
				}
			}			
			return false;
		}
	}
	

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