public class test2 {
	ApexPages.StandardController stdCtrl;
    public List<Prijava__c> links {get; private set;}
    public String contIdChosen {get; set;}

    public test2(ApexPages.StandardController std) {
        stdCtrl=std;
        links = [
            select tudent__r.Name, tudent__r.Priimek__c
            from Prijava__c
        ];
    }
}


<apex:page standardController="Prijava__c" extensions="test2">
    <apex:includeScript value="{!$Resource.jQueryMin}"/>

    <div id="d1">tmp1</div>
    <div id="d2">tmp2</div>
    <apex:form id="i1">
        <apex:pageBlock id="i2">
            <apex:pageBlockTable value="{!links}" var="item" id="i3" >
                <apex:column headerValue="Ime" >
                    <apex:outputField value="{!item.tudent__r.Name}" />
                </apex:column>
                <apex:column headerValue="Priimek">
                    <apex:outputField value="{!item.tudent__r.Priimek__c}" />
                </apex:column>
            </apex:pageBlockTable>
        </apex:pageBlock>
    </apex:form>
    <script type="text/javascript">
        $(document).ready(function() {
            document.getElementById("d1").innerHTML+="TEST";
            var data=document.getElementById('{!$Component.i1.i2.i3}');
            alert(data+" "+data.value);
        });
    </script>
</apex:page>