js去掉空格键和js过滤特殊字符
过滤空格键<script>function trim(inputString) { //xiao duan 22/06/2007 if (typeof inputString != "string") { return inputString; } var retValue = inputString; var ch = retValue.substring(0, 1); while (ch == " ") { //检查字符串开始部分的空格 retValue = retValue.substring(1, retValue.length); ch = retValue.substring(0, 1); } ch = retValue.substring(retValue.length-1, retValue.length); while (ch == " ") { //检查字符串结束部分的空格 retValue = retValue.substring(0, retValue.length-1); ch = retValue.substring(retValue.length-1, retValue.length); } while (retValue.indexOf("") != -1) { //将文字中间多个相连的空格变为一个空格 retValue = retValue.substring(0, retValue.indexOf("")) + retValue.substring(retValue.indexOf("")+1, retValue.length); } return retValue; }//--> </script>//过滤特殊字符<script>function CheckIfEnglish( String ){ var Letters = "(!@#$%^&*;':)"; var i; var c; if(String.charAt( 0 )=='-') return false; if( String.charAt( String.length - 1 ) == '-' ) return false; for( i = 0; i < String.length; i ++ ) { c = String.charAt( i ); if (Letters.indexOf( c ) > 0) return false; } return true;}</script><script language="javascript">//更多的过滤字符，请自己补充到new Array("char","varcahr","#"); function checkForms(){ var iu, iuu, regArray=new Array("char","varcahr","#","admin"); iuu=regArray.length; var obj=document.getElementById("username"); if(obj.value=="") { alert("用户名不能为空"); obj.focus(); return false; } for(iu=1;iu<=iuu;iu++) { if(regArray !="") { if (obj.value.indexOf(regArray)!=-1) { alert("注册名不可以包含：" + regArray); document.Gforms.username.focus(); return false; } } } return true; }</script><form method="post" >请输入用户名:<input type="text" name="username"><input type="submit" name="Submit" value="提交"> </form>
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