文本框輸入限制大全

1上面的文本框只能輸入數字代碼(小數點也不能輸入):

CODE:
<input  onkeyup="this.value=this.value.replace(//D/g,'')"  onafterpaste="this.value=this.value.replace(//D/g,'')">
<input  onkeyup="this.value=this.value.replace(//D/g,'')"  onafterpaste="this.value=this.value.replace(//D/g,'')">
2只能輸入數字,能輸小數點.(注意漢字.用輸入法和複製上面三個是有區別的在這裏)

CODE:
<input  onkeyup="if(isNaN(value))execCommand('undo')"  onafterpaste="if(isNaN(value))execCommand('undo')">
<input  onkeyup="if(isNaN(value))execCommand('undo')"  onafterpaste="if(isNaN(value))execCommand('undo')">

CODE:
<input  name=txt1  onchange="if(//D/.test(this.value)){alert('只能輸入數字');this.value='';}">
<input  name=txt1  onchange="if(//D/.test(this.value)){alert('只能輸入數字');this.value='';}">

CODE:
<input type=text t_value="" o_value="" onkeypress="if(!this.value.match(/^[/+/-]?/d*?/.?/d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?)?$/))this.o_value=this.value" onkeyup="if(!this.value.match(/^[/+/-]?/d*?/.?/d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?)?$/))this.o_value=this.value" onblur="if(!this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?|/./d*?)?$/))this.value=this.o_value;else{if(this.value.match(/^/./d+$/))this.value=0+this.value;if(this.value.match(/^/.$/))this.value=0;this.o_value=this.value}">
<input type=text t_value="" o_value="" onkeypress="if(!this.value.match(/^[/+/-]?/d*?/.?/d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?)?$/))this.o_value=this.value" onkeyup="if(!this.value.match(/^[/+/-]?/d*?/.?/d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?)?$/))this.o_value=this.value" onblur="if(!this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?|/./d*?)?$/))this.value=this.o_value;else{if(this.value.match(/^/./d+$/))this.value=0+this.value;if(this.value.match(/^/.$/))this.value=0;this.o_value=this.value}">

3只能輸入字母和漢字

CODE:
<input onkeyup="value=value.replace(/[/d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[/d]/g,''))" maxlength=10 name="Numbers">
<input onkeyup="value=value.replace(/[/d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[/d]/g,''))" maxlength=10 name="Numbers">

4只能輸入英文字母和數字,不能輸入中文

CODE:
<input onkeyup="value=value.replace(/[^/w/.//]/ig,'')">
<input onkeyup="value=value.replace(/[^/w/.//]/ig,'')">

5只能輸入數字和英文chun

CODE:
<input onKeyUp="value=value.replace(/[^/d|chun]/g,'')">
<input onKeyUp="value=value.replace(/[^/d|chun]/g,'')">

6小數點後只能有最多兩位(數字,中文都可輸入),不能輸入字母和運算符號:

CODE:
<input onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || //./d/d$/.test(value))event.returnValue=false">
<input onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || //./d/d$/.test(value))event.returnValue=false">

7小數點後只能有最多兩位(數字,字母,中文都可輸入),可以輸入運算符號

CODE:
<input onkeyup="this.value=this.value.replace(/^(/-)*(/d+)/.(/d/d).*$/,'$1$2.$3')">
<input onkeyup="this.value=this.value.replace(/^(/-)*(/d+)/.(/d/d).*$/,'$1$2.$3')">