How can we access values from javascript fn into Codebehind?

Ad.Happy New year guys!

I have created a dynamic <Span> in Javascript like.,

function assignMembersName()

{

var dynamicSpan = document.createElement("span");

var strMembersName = membersName.options[membersName.selectedIndex].text;
var strMembersId = membersName.options[membersName.selectedIndex].value;
dynamicSpan.name = 'span' + strMembersId; --------Dynamic id comes from codebehind

dynamicSpan.value = strMembersName; ----------Dynamic values comes from codebehind

var td = document.getElementById('tdDynamic').innerText = document.getElementById('tdDynamic').innerText +

',' + dynamicSpan.value;

}

Now I need to set classname for that all created span and sholud stored in a variable at codebehind,

bcoz, the values generated by the dynamic span should be insert into Sqlserver table,

so i need to send these values as a parameter.

How can i access the span values in code behind?