javascript 去空格函数实现代码
HTML 内容:
<table style="margin-top: 100px;border-top:black;"> <tr><td>用户名:</td><td><input type="text" id="txtusername" name="txtusername"/></td></tr> <tr><td>密 码:</td><td><input type="text" id="txtpassword" name="txtpassword"/></td></tr> <tr><td colspan="2" align="center"><input type="button" id="btnSubmit" name="btnSubmit" value="登录" onclick="FromSubmit();"/></td></tr> </table>
脚本内容(String的属性):
<script type="text/javascript"> String.prototype.trim = function() { return this.replace(/(^\s*)|(\s*$)/g, ""); }; String.prototype.ltrim = function() { return this.replace(/(^\s*)/g, ""); }; String.prototype.rtrim = function() { return this.replace(/(\s*$)/g, ""); }; </script>
应用:
<script type="text/javascript"> function FromSubmit() { var username = document.getElementById("txtusername").value; var password = document.getElementById("txtpassword").value; if(username.trim()!="" && username.trim()=="admin" && password.trim()!="" && password.trim()=="admin" ) { document.getElementById("form1").submit(); } } </script>
将trim写成函数形式:
<script type="text/javascript"> function trim(str){ //删除左右两端的空格 return str.replace(/(^\s*)|(\s*$)/g, ""); } function ltrim(str){ //删除左边的空格 return str.replace(/(^\s*)/g,""); } function rtrim(str){ //删除右边的空格 return str.replace(/(\s*$)/g,""); } </script>