JS验证修改-优快云博客

JS验证页面的值有没有修改过...


function initPage()   
{
 for(i=0;i<document.all.tags("select").length;i++)       
 {   
	  var select = document.all.tags("select").item(i);
	  if(select.defaultValue == undefined)
	  	select.defaultValue = select.options[select.selectedIndex].value;  
 }   
}

function isModified(objID)   
{
	isChange = false;

	if(document.getElementById(objID) == undefined || document.getElementById(objID) == null)
	{
		return false;
	}

	var clInput = document.getElementById(objID).all.tags("input");        
	var clArea  = document.getElementById(objID).all.tags("textarea");
	var clSelect= document.getElementById(objID).all.tags("select");

	for (i=0;i<clInput.length;i++)       
	{
		if (isChange == true) {   
			break;           
		}              

		switch (clInput.item(i).type)               
		{                     
			case "text" :
				if (clInput.item(i).value != clInput.item(i).defaultValue)                       
				{               
					isChange = true;                               
					break;                          
				}                         
			case "radio" :                          
				if (clInput.item(i).checked != clInput.item(i).defaultChecked)                      
				{                               
					isChange = true;                               
					break;
				}                    
			case "checkbox" :                          
				if (clInput.item(i).checked != clInput.item(i).defaultChecked)
				{
					isChange = true;                                
					break;                           
				}                 
		}        
	}                

	for (i=0;i<clArea.length;i++)       
	{             
		if (isChange ==true) {
			break;  
		}                           

		if (clArea.item(i).value != clArea.item(i).defaultValue)           
		{                   
			isChange = true;                   
			break;              
		}        
	}

	for (i=0;i<clSelect.length;i++)       
	{             
		if (isChange ==true) {
			break;
		}

		if (clSelect[i].defaultValue != clSelect[i].options[clSelect[i].selectedIndex].value)           
		{                   
			isChange = true;                   
			break;              
		}        
	}

	return isChange;
}

HTML调用：
[code]
<script> isModified(document.forms[0].name) </script>
<BODY οnlοad="initPage()">
[/code]

Java验证form的值是否被修改过....


	public boolean isChange(Form preForm, Form curForm) {
		Class  form = Form.class;
        Method[] method = form.getMethods();  
        String pre;
        String cur;
        for(int i=0; i<method.length; i++)  
        {  
        	String n = method[i].getName();
        	if (n != null && n.length() >3 && n.substring(0,3).equals("get") 
        			&& !n.equals("getClass") &&  !n.equals("getTimestamp")
        			//不需要比较的方法最加...
        			){
        		try {
        			if(preForm != null && curForm != null) {
        				pre = (String)method[i].invoke(preForm, new Object[0]);
    	        		cur = (String)method[i].invoke(curForm, new Object[0]);
    	        		 if(isNotBlank(pre) && isNotBlank(cur)) {
    	        			 if (!pre.equals(cur)) {
    	        				 return true;
    	        			 }
    	        		 }
    	        		 else if((isBlank(pre) && isNotBlank(cur)) || (isNotBlank(pre) && isBlank(cur))){
    	        			 return true;
    	        		 }
        			}
        		} catch(Exception e) {
        			e.printStackTrace();
        		}
        	 }
         }  

		return false;
	}

	public  boolean isBlank(String target) {
		if (target == null || target.equals("")) {
			return true;
		}
		return false;
	}

	public boolean isNotBlank(String target) {
		//target = trim(target);
		if (target == null || target.equals("")) {
			return false;
		}
		return true;
	}