清除form表单空格

function trimAllPageElements(){
// inputs
trimAllPageElementsByTagName("input");
// textareas
trimAllPageElementsByTagName("textarea");
}
function trimAllPageElementsByTagName(tagName){
if(tagName==null || tagName==undefined){
return;
}
var els = document.getElementsByTagName(tagName);
for(var i=0; i<els.length; i++){
handleSingleElement(els[i]);
}
}
function handleSingleElement(element){
if(element==null || element==undefined){
return;
}
if (element.type.indexOf("text") == 0 || element.type.indexOf("textarea") == 0 || element.type.indexOf("hidden") == 0) {
element.value = trim(element.value);
}
if (element.type.indexOf("password") == 0) {
element.value = trim(element.value);
}
}
function trim(str) {
if (str != null) {
var i;
for (i=0; i<str.length; i++){
if (str.charAt(i)!=" ") {
str=str.substring(i,str.length);
break;
}
}
for (i=str.length-1; i>=0; i--) {
if (str.charAt(i)!=" ") {
str=str.substring(0,i+1);
break;
}
}
if (str.charAt(0)==" ") {
return "";
} else {
return str;
}
}
}

转载于:https://www.cnblogs.com/zyz68/p/6526605.html