限制文本框只能输入数字
< input onkeyup ="if(isNaN(value))execCommand('undo')" onafterpaste ="if(isNaN(value))execCommand('undo')" > < input name =txt1 onchange ="if(/\D/.test(this.value)){alert('只能输入数字');this.value='';}" > < input onkeyup ="if(isNaN(value))execCommand('undo')" onafterpaste ="if(isNaN(value))execCommand('undo')" > < input name =txt1 onchange ="if(/\D/.test(this.value)){alert('只能输入数字');this.value='';}" > 转载于:https://www.cnblogs.com/LCX/archive/2007/08/29/874781.html
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