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how to pass a value to apex class from java script


    In a java script i have done some callculations and i  want to pass dat value to the apex class .


 for this i just used the apex function tag but how can i pass the parameter for a function?


this is my Visualforce code 






Age = CDateArr[3] - BDateArr[3];
document.getElementById('ageop').value = Age; 






<apex:actionFunction name="agesend" action="{!age}"/>




apex code is


string ageval;



public void age(ages)


if any one know the solution please help me

Best Answer chosen by Admin (Salesforce Developers) 

You can do it in two ways - Put the Age value from javascript into an inputHidden apex tag that has a value from your controller, or add an apex param tag onto your actionFunction:


Using an inputHidden:

<script> Age = CDateArr[3] - BDateArr[3]; document.getElementById('{!$Component.ageop}').value = Age; </script> <apex:inputHidden id="ageop" value="{!ageVal}"> Apex: public String ageVal {get; set;}


Using an actionFunction:



<script> Age = CDateArr[3] - BDateArr[3]; agesend(Age); </script> <apex:actionFunction name="agesend" action="{!doAction}"> <apex:param name="age" value="0" assignTo="{!ageVal}" /> </apex:actionFunction> Apex: public String ageVal {get; set;} public void doAction() { // Do something here if required }




Using an actionFunction would be more beneficial if you wanted to run an action (It looks as if you don't need to)