function validate(str){
var illegalChars = ['*','-'];//指定的特殊字符写在这个数组里面，个数不限。
str = str.value;
var numberCount = 0;
var upperCaseCount = 0;
var lowerCaseCount = 0;
var otherCharCount = 0;
var numberIndex = 0;
var upperCaseIndex = 0;
var lowerCaseIndex = 0;
var otherCharIndex = 0;
var temp;
for (var i = 0; i < str.length; i++) {
temp = str.charAt(i);
for(var j = 0; j < illegalChars.length; j++){
if(temp == illegalChars[j]){
return false;
}
}
temp = temp.charCodeAt();
if (temp >= 48 && temp <= 57) {
numberIndex = i;
numberCount++;
}else if(temp >= 65 && temp <= 90){
upperCaseIndex = i;
upperCaseCount++;
}else if(temp >= 97 && temp <= 122){
lowerCaseIndex = i;
lowerCaseCount++;
}else{
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