嗨,我正在尝试在 javascript 中从两端修剪字符串,但它无法正常工作。脚本无法工作,或者有时它会从文本框中失去焦点。我正在编写像下面这样的javascript并在验证函数中调用它
function trim(s)
{
if (typeof s!= "string") {
return s;
}
var retValue = s;
var ch = retValue.s(0, 1);
while (ch == " ")
{ retValue = retValue.substring(1, retValue.length);
ch = retValue.substring(0, 1);
}
ch = retValue.substring(retValue.length-1, retValue.length);
while (ch == " ")
{
retValue = retValue.substring(0, retValue.length-1);
ch = retValue.substring(retValue.length-1, retValue.length);
}
while (retValue.indexOf(" ") != -1)
{
retValue = retValue.substring(0, retValue.indexOf(" ")) + retValue.substring(retValue.indexOf(" ")+1, retValue.length);
}
return retValue;
}
function validate() {
// alert("Please! Enter Farm Name");
if (!trim(document.getElementById("<%=txtFarm_Name.ClientID%>").value)) {
alert("Please! Enter Farm Name");
document.getElementById("<%=txtFarm_Name.ClientID%>").focus();
return false;
}
}