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1、只能输入数字
<input type="number" min="0"onkeyup="this.value=this.value.replace(/\D/g,'')" onblur="this.value=this.value.replace(/\D/g,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')">2、只能输入数字和小数点
<input type="number" min="0" onkeyup="this.value=this.value.replace(/^\D+(\.\d{2})?$/,'')" onblur="this.value=this.value.replace(/^\D+(\.\d{2})?$/,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')">
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原文地址:http://blog.csdn.net/dale_dede/article/details/45485425