onChange="if(this.value.replace(/([^\d\.\+\-\*/]+)*/g,'')!=""){alert('真抱歉!XXX只能填写数字、小数点或运算符。');this.focus();}">
onkeyup="value=value.replace(/([^\d/]+)*/g,''); " //不带符号的数值
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输入数字:
<input type="text" onkeyup="this.value=this.value.replace(/\D/g,'')"><br/>
输入英文:
<input type="text" onkeyup="this.value=this.value.replace(/[^a-zA-Z]/g,'')">
输入中文:
<input type="text" onkeyup="this.value=this.value.replace(/[^\u4e00-\u9fa5]/g,'')">
onkeyup="value=value.replace(/([^\d/]+)*/g,''); " //不带符号的数值
-------------
输入数字:
<input type="text" onkeyup="this.value=this.value.replace(/\D/g,'')"><br/>
输入英文:
<input type="text" onkeyup="this.value=this.value.replace(/[^a-zA-Z]/g,'')">
输入中文:
<input type="text" onkeyup="this.value=this.value.replace(/[^\u4e00-\u9fa5]/g,'')">