[SalesForce] Custom Label: Passing Parameter

I ended up just adding a few lines to the javascript to manipulate the label. So the label says "Enter at least {0} characters to search." in the value section.

Then on the page javascript I used the .replace() method for strings to replace the {0} with the minLength that the user wants.

function validate(){
    var input = document.getElementById('{!$Component.EntireRelationshipWidget.headerForWidget.searchAndClearButtons.searchBarForm.searchBar}').value;
    var minLength = 3;
    if(input.length < minLength){
        var stringToPrint = $Label.Alert_message_for_search_function.replace('{0}', minLength.toString());
        alert(stringToPrint);
        return false;
    }
    searchFunction();
    return true;
}

I did this a very different way...

So rather than use a Formula field to do this I use a workflow rule with a field update. The amount of space in the field update is much greater so your statements will not be an issue.

In fact I use this method to check the difference between the Product total amount (roll up of Opportunity Line Item) and the Estimated Revenue that the Opportunity Owner enters manually (this being their best idea of the value of the opportunity at any given step).

We check the month, quarter and year of the opportunity, check whether the value is above or below a certain threshold and the line of business and the end response sets a field (called RedAmberGreen__c) that is not on their page view and then I use a formula field to show either a red, amber or green light.