<input type="text"onKeyUp="this.value=this.value.replace(/[^/./d]/g,'');if(this.value.split('.').length>2){this.value=this.value.split('.')[0]+'.'+this.value.split('.')[1]}">
1.文本框只能輸入數(shù)字代碼(小數(shù)點(diǎn)也不能輸入)
<inputōnkeyup="this.value=this.value.replace(//D/g,'''')"ōnafterpaste="this.value=this.value.replace(//D/g,'''')">
2.只能輸入數(shù)字,能輸小數(shù)點(diǎn).
<inputōnkeyup="if(isNaN(value))execCommand(''undo'')"ōnafterpaste="if(isNaN(value))execCommand(''undo'')">
<input name=txt1ōnchange="if(//D/.test(this.value)){alert(''只能輸入數(shù)字'');this.value='''';}">
3.數(shù)字和小數(shù)點(diǎn)方法二
<input type=text t_value="" o_value=""ōnkeypress="if(!this.value.match(/^[/+/-]?/d*?/.?/d*?$/))this.value=this.t_value;elsethis.t_value=this.value;if(this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?)?$/))this.o_value=this.value"ōnkeyup="if(!this.value.match(/^[/+/-]?/d*?/.?/d*?$/))this.value=this.t_value;elsethis.t_value=this.value;if(this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?)?$/))this.o_value=this.value"ōnblur="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(/^/.$/))this.value=0;this.o_value=this.value}">
4.只能輸入字母和漢字
<input ōnkeyup="value=value.replace(/[/d]/g,'''')"onbeforepaste="clipboardData.setData(''text'',clipboardData.getData(''text'').replace(/[/d]/g,''''))"maxlength=10 name="Numbers">
5.只能輸入英文字母和數(shù)字,不能輸入中文
<inputōnkeyup="value=value.replace(/[^/w/.//]/ig,'''')">
6.只能輸入數(shù)字和英文
<inputōnKeyUp="value=value.replace(/[^/d|chun]/g,'''')">
7.小數(shù)點(diǎn)后只能有最多兩位(數(shù)字,中文都可輸入),不能輸入字母和運(yùn)算符號(hào):
<inputōnKeyPress="if((event.keyCode<48 ||event.keyCode>57) &&event.keyCode!=46 ||//./d/d$/.test(value))event.returnValue=false">
8.小數(shù)點(diǎn)后只能有最多兩位(數(shù)字,字母,中文都可輸入),可以輸入運(yùn)算符號(hào):
<inputōnkeyup="this.value=this.value.replace(/^(/-)*(/d+)/.(/d/d).*$/,''$1$2.$3'')">
