只能输入数字的文本框： <script>function JHshNumberText(){ if ( !(((window.event.keyCode >= 48) && (window.event.keyCode <= 57))   || (window.event.keyCode == 13) || (window.event.keyCode == 46)   || (window.event.keyCode == 45)))  {   window.event.keyCode = 0 ;  }} </script>  只能输入汉字的文本框：  <SCRIPT language="javascript"> function onlychinese()    {    if ((window.event.keyCode >=32) && (window.event.keyCode <= 126))     {     window.event.keyCode = 0 ;    }   }  </SCRIPT> 只能输入0-9和T-Z之间的字符的输入框 <script>function JHshNumberText(){ if ( !(((window.event.keyCode >= 48) && (window.event.keyCode <= 57))   || (window.event.keyCode == 13) || (window.event.keyCode == 46)   || (window.event.keyCode == 45) || ((window.event.keyCode >= 84)   && (window.event.keyCode <= 90))))  {   window.event.keyCode = 0 ;   alert("请输入0-9和T-Z之间的字符。。。");  }} </script>

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